期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 177, 期 12, 页码 942-948出版社
ELSEVIER
DOI: 10.1016/j.mseb.2012.04.020
关键词
ZnSnO3 nanoparticles; Cubic-like aggregates; Inorganic salt; Effect; Gas sensors
资金
- National Natural Science Foundation of P.R. China [21071130]
- Outstanding Scholar Program of Henan Province, P.R. China
- start-up grant from State Laboratory of Surface and Interface Science and Technology (SLSIST)
The effect of added solid inorganic salts on the morphology of ZnSnO3 nanoparticle aggregates has been investigated based on solventless and organic-free reactions at ambient temperature. Cubic-like aggregates of ZnSnO3 nanoparticles can be synthesized successfully through direct reaction of solid MOH (M+ = K+, Na+) with a solid mixture of ZnCl2 and SnCl4 center dot 5H(2)O in the presence of added inorganic salt, MCl (M+ = K+, Na+). In contrast, irregular spherical aggregates of ZnSnO3 nanoparticles are produced in the reactions in absence of added solid inorganic salts. The added solid inorganic salts, which play a key role for producing the cubic-like aggregates of ZnSnO3 nanoparticles with pores of ca. 2.8 nm, may act as a substrate-template for the growth of nanocrystals and the formation of their cubic-like aggregates. Gas sensors are further constructed with the aggregates of ZnSnO3 nanoparticles as sensing materials. The sensors made with the cubic-like aggregates (C-sensors) exhibit much higher responses to the reducing gases tested, compared to those (S-sensors) from spherical aggregates synthesized without adding inorganic substrate-template into the reaction. The approach could open a new pathway for controlling the microstructure of materials with high gas sensing functionality. (c) 2012 Elsevier B.V. All rights reserved.
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